Earlier today my sky remote batteries had completly died on me. I should have changed them weeks ago like the thing told me to via the information on tv. I have now put new batteries in and if I press the buttons I get no infra red dot on the censor unless I press tv. I really want to get it to work because I want to watch the football and choose what games to watch but I can't because my red button does not work unless I press tv which is not good enough . Do I have to press a the sky button along with another button to make it work?